Would Biology or Maths A Level be more useful if I'm interested in Criminology or Forensic Psychology ?

Personally I would do Biology and Maths, not Sociology, in fact it is what I'm doing. Maths is seen as a very good subject, as is Biology, as Psychology may not be seen everywhere as a science. However your options are good too, they should allow you to study both of the courses you are interested in. I would talk to a careers adviser, just to be sure. Good luck.